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GNS - Gesellschaft für nachhaltige Stoffnutzung mbH Utilisation of biomass, residues and wastes 

Reduce, reuse, recycle – we write sustainability in capital letters!

We at GNS have specialised in the topics of recycling management, environmental technology and the use of biomass. Our work aims to develop technologies for reducing emissions, recycling waste and recovering valuable materials for our customers.

In our laboratory and pilot plant, we examine the most diverse natural and residual materials of our customers from Germany and abroad. We test all treatment steps in theory and practice and derive new process engineering solutions from them.

Processes and products for sustainable material utilisation – cooperation with partners

From scientific conception and technology development to engineering and project management, we take on the realisation of complex tasks related to the utilisation of biomass, residual materials and waste in cooperation with partner companies. In doing so, we are active throughout Germany as well as Europe.

Find out more about us and our work!

Problem solutions

Do you need process engineering for the utilisation of biomass and waste? Use our services in environmental consulting and engineering!

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Processes & Products

Our processes for biomass gasification and fermentation residue treatment are developed in-house and are ready to use. 

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Assessment & Expertise

We at GNS are your partner when it comes to assessments, tests and expert opinions on new processes.

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Studies & Concepts

We are your partner for carrying out scientific studies and preparing GHG balances.

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Laboratory & pilot plant

Whether waste analysis, fermentation test or fuel analysis - our laboratory is available to you individually according to your needs. Find out more here!

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Do you have any questions about our services?

We will be happy to answer your questions personally! Simply send us an email to or use our contact form. You are also welcome to contact us by telephone on 0345 - 55 83 754. We look forward to your inquiry!

Our awards and memberships

Investment security Through proven expertise for investors, planners & plant operators

Processes and process combinations often involve great risks for the investor. Comprehensive expertise is essential, especially at the level of process functionality. This is the only way that investments in the millions can generate the desired return. Our team has decades of experience in the field of environmental and process engineering.

We prepare independent expert reports, material and energy balances and supervise plant optimisation on-site. Many investors, planners and plant operators have already benefited from the knowledge of our process chemists and process engineers. Each process is carefully examined by us down to the smallest detail. This gives you greater investment security and you do not have to fear any unpleasant surprises.

Our current events & projects

Events & Publications

22. November 2023 Lecture at the 22nd South German Biogas Conference in Ursberg

In view of increasing bureaucracy, many operators of biogas plants are asking themselves whether and how biogas still has a future. There was a lot of information and competent orientation aids at the South German Biogas Conference on November 22nd, 2023 in Ursberg. We were there and talked about the possibilities of using fermentation residues for materials.

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New projects & project information

December 2023 More energy from digested sludge - advice for sewage treatment plants

Municipal wastewater treatment plants are increasingly interested in reducing their energy requirements for wastewater treatment and sludge treatment and covering them by generating their own energy from sewage sludge disturbance. The possibilities are diverse, but there are also numerous process engineering tasks to be solved to exploit this potential.

A first step is to examine the residual gas potential, which we determine in our laboratory through fermentation tests. Furthermore, there is an energy balance basis to evaluate different technical
variants of process optimization. Co-fermentation or high-load digestion also offer opportunities to increase efficiency.

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